Senior Systems Administrator: GCC High IAM & Cloud Security

ITResource Hunter; El Segundo (CA); On-site; USD 130,000 - 170,000; Full time

Job summary

ITResource Hunter in El Segundo, CA is seeking a Senior Systems Administrator to own the Microsoft 365 GCC High environment, Entra identity, endpoint management, and SaaS infrastructure. You will drive the CMMC control evidence and build automation from the ground up in a cloud-first setting.

This high-ownership role requires 7+ years of production systems experience, strong networking fundamentals, and the ability to operate across IAM, security, and AWS workloads with minimal on-prem

Qualifications

• Bachelor's degree in Information Technology, Computer Engineering, Cybersecurity, or a similar field (4 years of work experience in lieu of a degree).
• 7+ years administering and engineering production systems.
• GCC High tenant administration, Entra, self-built IAM automation, Intune without Group Policy, email security and Purview, and SaaS/AWS administration.
• Solid networking fundamentals: VLANs, routing, firewall policy, DNS/DHCP, VPN, wireless.
• Treats compliance control implementation and evidence collection as normal work.
• Service is the job; tier-1 handles day-to-day support, but nobody's too senior to help the person at their desk.

Responsibilities

• Own Microsoft 365 GCC High: Exchange Online, SharePoint, Teams, and tenant configuration underneath them; be the authority on what's possible in this cloud and what has to be built in-house.
• Own Entra end-to-end: conditional access, privileged access, app registrations, and single sign-on.
• Build the IAM automation layer, the centerpiece of the role: joiner/mover/leaver lifecycle, entitlements driven by HR data, provisioning through Graph and SCIM, and access reviews that run themselves.
• Own Windows and endpoint management through Intune, Autopilot, compliance policy, and update rings across the fleet, with no Group Policy underneath.
• Own email security and information protection: Defender for Office, mail flow and anti-phishing posture, and Purview for DLP, labeling, and retention in an environment handling CUI.
• Own SaaS administration and integration across the business application portfolio, including Box and Slack; some running today, some a project waiting for an owner.
• Own the workloads, services, and licensing infrastructure running in AWS, in constant contact with the IT DevOps engineer who owns the account layer.
• Take new platform projects from idea to deployed, integrated, and documented.
• Implement and evidence the technical controls in these areas for the CMMC assessment ahead, as normal work rather than a detour.

Skills

GCC High admin

Entra IAM automation

Intune without GPO

Email security & Purview

SaaS/AWS administration

Automation scripting

Education

Bachelor's degree in IT or related field (or 4 years of experience)

Tools

Microsoft Graph

SCIM

Terraform

Bicep

Intune

Purview

Defender for Office

Job description

ITResource Hunter in El Segundo, CA is seeking a Senior Systems Administrator to own the Microsoft 365 GCC High environment, Entra identity, endpoint management, and SaaS infrastructure. You will drive the CMMC control evidence and build automation from the ground up in a cloud-first setting.

This high-ownership role requires 7+ years of production systems experience, strong networking fundamentals, and the ability to operate across IAM, security, and AWS workloads with minimal on-prem